Machine for cutting bungs



UNITED. STATES.

PATENT OFFICE.

SOLOMON O. CHASE, OF NORTH BALTIMORE, OHIO.

MACHINE, FoR CUTTING 'BUNGS.

SPECIFICATION forming part of Letters Patent No. 357,175, dated February8, 1887.

' Application filed April 30, 886. Serial No. 200,668. (No model.)

. To all whom it may concern: I

-make and use the same, reference being had to the accompanyingdrawings, which form a part of this specification, and in which Figure lisa perspective view of my improved machine for cutting bungs or similarwooden disks. 'Fig. 2 is a longitudinal vertical sectional view of thesame; and Fig. 3 is a perspective detail view, on an enlarged scale,

of the cutting end of the machine. N

Similar letters of reference indicate corre sponding parts in all thefigures.

My invention has relation to machines'for cutting bungs or similarwooden disks; and it consists in the improved construction andcombination of parts of such a machine, in which the bung is cut out ofa board of a suit able thickness by two revolving cutter-bits revolving'arounda common center and having means for contracting them as thecutting progresses, so that the bung will receive its proper taper,'ashereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates a frame which issuitably supported, and which is formed with two registeringlongitudinal bearings, B B, in which the tubular;

. shaft 0 of the cutter is jonrnaled. 3 An inner tubular shaft, D,slides within the outer tubular shaft, and projects at both ends of thesame, and this shaft is provided with a socket, E, in its rear end,within which socket a ball,- F, is secured. A lever, G, is pivoted atone end. to the rear end of the frame, and bears against the ball in theend of the inner shaft,

serving to push the said shaft forward when.

the outer end of the lever is forced forward. If desired, any othersuitable means for forcing the tubular shaft forward may be used,

l although the lever is the most convenient and simple means forperforming the work.

Acoiled spring, H, is placed within the rear end of the inner tubularshaft, bearing against the closed rear end and against a crossbar, I,which is secured atits ends to the inner sides of V the outer tubularshaft and projects through longitudinal slots J J in the sides of theinner shaft, the spring serving-to draw the inner tubular shaft rearwardafter it has been forced forward.

The outertubular shaft is provided with a wedge-shaped guides, B R,secured to the sides of theforward end of the outer tubular shaft. Thesewedge-shaped guides increase in width toward the forward end of theshaft and cause the grooves and outer edges of the guides. to diverge,so that when the inner shaft is pushed forward within the outer shaftthe rear ends of the bits will be forced apart, causing the forwardcutting ends of these cutters to contract and consequently to cut in asmaller circle than when the shaft is not forced forward, so that aconical block or disk may be and formed with a perforation, throughwhich the shank T of a centering-disk, U, may pass, the said disk beingswiveled to the end of the shank and having 'points V upon its outerface. Theinner end of this shank which slides in the perforation isprovided with a small disk or head, WV, which bears'against the forwardend of a spring, X, within the shaft, which spring bears with its rearend against a suitable disk or stop, Y, within the shaft, the springserving to force the shank and centeringdisk forward. Alaterally-projecting bit,Z, having its outer end bent slightly down,fits adjustably with its shank A in the forward end of the innershaft,havinga set-screw, B, for adjusting it.

Theframe of the machine is provided with suitable guides, C, or stops,against which a board may be placed and moved transversely to the shaftand to the cutters, and when the machine is in operation the board isplaced against the guides with one end opposite to the cutters.

When the shaft is revolved and the proper place of the board to be cutinto bungs has been placed opposite to the cutters, the inner tubularshaft is forced forward, causing the centering disk to bear against theportion which will become abung when finished,while the cutters will cuta groove around the bung, contracting toward the outer end as the innershaft with the cutters are forced into the board by the lever, and atthe time when the cutters are cutting through the board the laterallyprojecting bit with the curved end will bear against the face of thebung and trim off the face of the bung and round off the edges,finishing the bung, so that' it is ready for use the moment thecentering-disk and its spring-cushioned shank pushes the finished bungout from between the bits after they have cut through the board.

The cutting end of one bit is provided with two cutting-lips upon itsside edges, as shown at D D,-upon the bit N, and the other bit,O, has acutting-lip, E, upon its inner side edge, so that the one bit will outboth sides of the out, making room for the other cutter which works upthe wood which has been thus cut loose and trims off the side of thebung by its inner cutting-lip. The bit having the two outting-lips willthus cut chiefly with the cuttinglips, and not with its forward edge,while the bit with only one cutting-lip will cut with its forward edge,the end of the bit being ground off obliquely, as shown at F.

The wedge-shaped grooved guides are secured upon a sleeve, G, whichslides upon the forward portion of the outer tubular shaft, and thissleeve is provided with a set-screw, H, by means of which the sleeve maybe adjusted so as to force the ends of the bits farther apart or closertogether for cutting bungs of different diameters.

Having thus described my invention, I claim and desire to secure byLetters Patent of the United States 1. In a machine for cutting bungs orsimilar wooden disks, the combination of an outer tubular shaft havingmeans for revolving it, an inner shaft sliding within the outer shaftand turning with it and having laterally-projecting ears upon itsforward end, means for sliding the inner shaft forward and back, bitspivoted near their cutting ends upon the ears of the inner shaft, andwedge-shaped guideblocks upon the outer tubular shaft having the innerends of the bits bearing against them, as and for the purpose shown andset forth.

2. In a machine for cutting bungs and similar wooden disks, thecombination of an outer tubular shaft having means for revolving it,

an inner shaft sliding within the outer shaft and turning with it andhaving laterally-projecting cars at diametricallyopposite sides of theforward end, means for sliding the inner shaft forward and back, bitspivoted near their cutting ends upon the ears and having inwardly-bentlips upon their inner ends, and wedgeshaped guide-blocks having theforward ends of their outer edges diverging and secured upon the forwardend of the outer tubular shaft,and having longitudinal grooves in theirsides parallel with the outer edges, and having the lips of the bitssliding in them, as and for the purpose shown and set forth.

3. In a machine for cutting bungs or similar wooden disks, thecombination of an outer tubular shaft having means for revolving it, aninner shaft sliding within the outer shaft and having longitudinal slotsin its sides, spring bearing with one end against the closed rear end ofthe inner tubular shaft within the same, and with its forward endagainst a crossbar passing through the slots in the inner tubular shaftfrom the sides of the outer shaft, a lever bearing against the rear endof the inner tubular shaft, two bits pivoted near their cutting endsupon diametrically-opposite ears of the forward end of the inner shaft,and wedgeshaped guide-blocks upon the forward end of the outer tubularshaft, having their forward ends wider than the rear and having the rearends of the bits bearing against their edges, as and for the purposeshown and set forth.

4. In a machine for cutting bungs or similar wooden disks, thecombination of a shaft having two cutters projecting with their ends atequal distances from the axis of the shaft, and having means for forcingtheir forward ends together during the progress of the cutting, withalaterally-projecting cutter having its outer end slightly curved andhaving its shank sliding in the end of the shaft and adjustably securedby a set-screw, as and for the purpose shown and set forth.

' 5. In a machine for cutting bungs or similar wooden disks, thecombination of an outer tubular shaft having means for revolving it, aninner shaft sliding within the outer shaft and turning with it andhavinglaterally-projecting ears at diametrically-oppositesides of itsforward end, means for sliding the inner shaft forward and back, bitspivoted near their cutting ends upon the cars and having inwardly-bentlips upon their inner 'ends, and a sleeve sliding adjustably upon theouter end of the outer tubular shaft and provided withoutwardly-wideningwedge-shaped guide-blocks having grooves in the sidesparallel with the outer edges for the reception of the inwardly-bentlips of the rear ends of the bits, as and for the purpose shown and setforth.

6. In a machine for cutting bungs or similar wooden disks, thecombination of a shaft, a cutter-bit projecting forward from the end ofthe shaft and having two outwardly-projectwooden disks, the combinationof a frame havingeutting-lips upon the side edges of its cut-- ting end,and a cutter-bit secured at an equal distance from the axis ofthe shaftand having an oblique outer end,forn1ing a sharp forward cutting-edge,and having an outwardly-projeeting cutting-lip.upon the inner edge ofits end, as and for the purpose shown and set forth.

7. In a machine for cutting bungs' or similar ing longitudinal bearingsand having. transverse guides, an outer tubular shaftjournaled in thebearings and having {a pulley upon its middle, an inner tubularshafthaving aball in its rear end and having longitudinal slots in itssides and two laterally-projecting cars at its outer end, a springwithin the inner tubular shaft bearing against the closed rear end andagainst a cross-bar projecting from the outer tubular shaft through theslots in the inner shaft, a lever pivoted upon the frame and bearingagainst the ball in the end of the inner shaft, a centering-diskswiveled upon a shank sliding in the outer end of the inner tubularshaft and having its inner end bearing against a spring,cutter-bitspi'voted near their cutting ends upon the lips of the innershaft and havinginwardly-bentlips upon the inner ends, a sleeve securedadjustab] y upon the forward end of the outer shaft and provided withtwo diametricallyopposite Wedge-shaped guideblocks widening toward theirforward ends and having longitudinal grooves in the sides, parallel withthe outer edges,for the lips upon the bits, and a cutter-bit having itsshank secured adj ustably in the outer end of the inner shaft, andhaving its bit bent laterally and curved at the outer end, as and forthe purpose shown and set forth.

In testimony that I- claim the foregoing as my own I have hereuntoaffixed my signature in presence of two witnesses.

SOLOMON o. oHAsn. Witnesses:

' WtH. KRATZ, J. B. TODD.

